Machine for scouring tin plates.



H. PETIN. MAGHINE Fou sooUmNG TIN PLATES.

APPLICATION FILED JUNE 2, 1011.

n Patented Aug. 6, 1912.

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UNITED srA'rEs PATENT oEEioE.

HECTOR PETIN, OF PARIS, FRANCE, ASSIGNOR T0 SOCIT DITE: ETABLISSEMENTS J. J. CARNAUD, ET FORGES DE BASSE-INDRE, 0F PARIS, FRANCE.

MACHINE FOR SCOURING TIN PLATES.

Specification of Letters Patent.

Application filed .Tune 2, 1911.

Patented Aug. 6, 1912.

Serial No. 630,819.

To all whom it may concern:

Be it known that I, HEc'roR PE'rIN, a citizen of the Republic of France, residing in Paris, France, have invented certain new and useful Improvements in Machines for Securing Tin Plates, of which the following is a specification.

This invention has for its object a machine for scouring tin plates by simply passing the plates through a series of superposed hoppers containing suitable scourlng material, such as gypsum, pink meal, wood saw-dust, etc.

The scouring of the tin plates is an 1ndispensable operation if perfect adherence of impressions on tin is to be assured, which cannot be the case if there be the least trace of grease on the metal plates. The tin plates are fed to the machine, which constitutes this invention, at the lower part thereof, and they rise successively through the superposed hoppers, being properly guided between pairs of rollers, which are employed for transferring them from hopper to hopper, by special guides. These rollers are operated by driving chains in such a manner that the two rollers of each pair are forcibly pressed toward each other so as to insure an efficient and regular feeding of the thinnest plates. A proper contact between the rollers and the tin-plates is, also, attained by allowing one of the rollers in each pair to be free to yield to the irregularities in the thicknesses of the flexible coverings applied to the peripheries of the metal rollers.

The improved machine, the object of this invention, is illustrated in the accompanying drawings in which- Figure 1 is a vertical cross section of the machine; Fig. 2 is an end view to a larger scale of part of the machine showing the ends of two roller drivers; Fig. 3 is a horizontal section to the scale of Fig. 2 of the machine; Fig. 4 is a vertical cro-ss section to a still larger scale, of one of the hoppers; Fig. 5 is a side View of part of the hopper; Fig. 6 is a side View of one of the upper guides within the hopper; and Fig. 7 a front view of one of the lower guides in the lower part of each hopper.

Between the vertical parallel side plates A of the frame of the machine, a number of superimposed hoppers B are arranged,

each of which has at its lower part an opening a for the passage of the metal sheets to be scoured. Below each hopper are arranged two rollers C covered with felt,

swanskin, caoutchouc or other material that will not scratch the tin plates. Each 110pper comprises two cheek plates B, which arc fixed to the frame A by bolts engaging in the bosses b, and two movable sheet iron sides c engaging in slotted brackets or lug pieces Z resting on lower guides e. Between these guides e the opening a for the passage of the tin plates through the scouring material is formed. The size of the opening may be regulated so that the scouring powder does not fall through by means of screws f which turn in the bearings g projecting from the inner faces of the cheeks B, and which engage the tapped holes h in the ends of the guides e, Fig. 7. The head of each screw is held by a pin 'i engaging in a groove j formed in the head.

In the interior of each hopper the upper guides D are arranged, one of which is shown in elevation in Fig. 6; these guides are adapted to maintain the tin plates in line. Each of the guides comprises a narrow plate D having projecting brackets or lugs lc; the upper edge of the plate D ts into the recess constituted by the bosses m, n on the inside of the cheeks B. The plate D is fitted with or is integral with the curved tooth-like members 0, the lower extremities of which extend very close to the oblique sides c; these toothed guides which at about their middles are bent in toward each other and reach upwardly as far as the drawing or feeding cylinders, assure a proper vertical direction for a tin plate, its maintenance in the plane passing through the points of contact of the successive feed rollers and its entry between the rollers in the most convenient manner.

The above construction of the scouring hoppcrs and interior guides allows of a rapid dismantling of a hopper in cases where the tin plate has creased up between the rollers or again where it becomes necessary to lift out a hard grain of the scouring material, gypsum or other substance, which is apt to scratch the metal sheets. The dismantling is rapidly effected by raising the sheet iron sides c and the guides D, and in case of need the lower guides c.

The entryofrthe tin plates 4at the lowerf part of the machine and their exit at the upper lpart are facilitated by the curved guides E E1, which arefixed between the side plates of the machine by means of the riveted supports 79, the heads of the rivets,z being carefully leveled off so as not to oier any hindrance to the passage ofthe plates,

The axle/of each of the rollers C carries at one of its extremities rsingle ytoothed pinion g, all of which pinions are of the same -diameter,=but the -pinionsi'of the two rollers fforming alpair are arranged 'on oppositesides =of `the :frameas vin Fig. 3 aand the superposed -rollers which are disposed onthesameside of the central vertical plane traversed by the plates to'bescoured have their `pinions valternately at their lopposite ends. Consequently,counting from bottom to top, \roller No.1 onthe left, No. 2I on the right, No. Bon therleft, No. 4 onthe right, etc., have their pinions gon one andthe samefside ofitheanachine frame,=and No. l on the right, No. 2 on the left, No.. 3 on the right, No. 4- on the left, etc., have their pinions on the other side. The pinions are thus situated in;two1planes,` one ony one side ofthe machine, the otherfon the other side of the machine, and `they lmesh with two driving chains r, r1 one of which chains passes .from Ythe left `handroller offene pair to V:the iright 'hand roller of an 4*upper or lower pai-r and so fort-h, as in 'Fig'. 1,'while the other ch-ain passes the reverse way from a roller on the `right to a roller on the left situatedabove-orbelow. The two lchains 1" and r1 areyendless and travel at the lower part vof the lmachine .over -two sprocket wheels s and at ythe upper partover two wheels t, also over two wheels u mounted on thespindleiO which carries thepower pulley'F.

At the lower partof the machine, one of the chains passes over a sprocket wheel u on the axle of which is mounted a roller G tangential to a roller G1. It is between vthe rollersfG, G1'thatthetinfplatesito be scoured are introduced, which then pass along the guide 1E and enter-thefirst hopper. At the upper part foffthe machine one of the chains passesaround a sprocket wheel the aXle of which 4carries a roller yH tangential to a roller H1; these two rollers H. vH1 Ldraw along the metal .plates coming .out of the uppermost hopper and Vdirected -by the curvedguide E1.

'It will -be seen :that the 'rollers C comprised in any one pair turn in opposite directions and that, the two chains exerting their ldrawing actionon the louter portions of l'the sprocket wheels, the tensions of the chains tend Ito draw lthe rollers closer together thereby vinsuring a close contact between them and consequently an eiiicient feed between the .rollers of the tin plates which thus rise progressively from hopper to hopper through the pulverulent material.

To obtain a good contact between the rollers of each pair, it is convenient that one of the rollers in each pair should'be free to 4adjust itself to .all the irregularities of thickness in the felt coverings which are applied to the metal portions of the rollers. For this purpose see Figs. 2 and 3) the ball bearings 1I, which Vsupport the rollers on "that side of the machine nearest where the Each ofthe brasses is arranged to prey vent the entrance of dust into theball bear ings; for this `purpose ythe casing yfor the bearings has screwed on to its outer end a cap K. which serves for the introduction into the casing ofgnon-liuid lubricant which may .ll completely fthe space yaround the bearings. ,A lead Awasher al is .placed -between the shoulder of the cap K and the casing. A felt washer b1 fitted in a cavity formed in the casing fits tightly yand rubs against kthe roller spindle `and stops ingress ofdust from the inner side ofthe casing. This machine advantageously takes the place of those scouring machines vthat draw along or feed the metal plates by means of metahfingers and it-'is adaptedto scour plates of all thicknesses, even very thin plates, .such as tinsel sheets, -without any yharm.

Having now particularly described and ascertained the nature of-my said invention and in what manner the same is to be performed, I declare that what I claim is:

l. A machine for scouring sheetsof tin, comprising a number rof superposed prismatic-shaped hoppers adapted to contain gypsum, or other scouring fmaterial, each hopper having anarrowopening initsbottom, a pair ofresiliently mounted contacting rollers below said opening adapted to-transfer the tinplates, andzguides disposed within the hoppers adapted to maintain the metal plates vertically .in the` axial plane of the hoppers.

2. A vmachine :for `scouring sheets of tin, Acomprising a number of superposed prismatic-shaped hoppers adapted to contain gypsum, or other scouring material, each adapted to maintain the metal plates verti cally in the axial plane of the hoppers, said rollers turning inversely to their opposite roller, each roller carrying a single pinion, the pinions of one pair of rollers being disposed so that one of them is on one side and the other on the other side oitl the machine, and an endless chain coperating with the pinions on one side of the machine, and another endless chain eoperating with the pinions on the other side.

3. In a. machine for scouring sheets of tin or the like, the combination ot' a number of hoppers, each having an opening at its lower part through which the sheets pass, a series of driving rollers arranged between the hoppers, and driving chains, on each side of the machine for operating said rollers, said driving chains passing around the outside of alternate rollers said rollers being adapted to be drawn together by said chains to seize the sheet of tin passing between them.

4;. In a machine for scouring sheets ot' tin or the like, the combination oi? a number o'll hoppers, each having an opening at its lower part through which the sheets pass, a series of driving rollers arranged between the hoppers, and two driving chains, one on each side of the machine for operating said rollers, said driving chains passing around the outside of alternate rollers, and the two driving chains being reversely arranged whereby the rollers are pressed toward each other so as to seize the sheet of tin passing between them.

5. ln a machine for scouring sheets of tin or the like, the combination of a number ot' superposed hoppers, adapted to contain a scouring material, each hopper having at its lower part two adjustable plates with an opening between for the passage of sheets of tin, and driving rollers for moving the sheet through said hoppers.

6. In a machine for scouring sheets ot' tin or the like, the combination of a number of superposed hoppers, adapted to contain a scouring material, each hopper having at its lower part two adjustable plates with an opening between for the passage of sheets of tin and removable side plates.

7. A machine for scouring sheets of tin, comprising a number of superposed prismatic-shaped hoppers adapted to contain gypsum, or other scouring, material, each hopper having a narrow opening in its bottom, a pair of resilient-ly mounted contacting rollers below said opening adapted to transfer the tin plates, and removable guides disposed within the hoppers adapted to maintain the metal plates vertically in the axial plane oi. the hoppers.

8. A machine for scouring sheets of tin, comprising a number of superposed pris matic-shaped hoppers adapted to contain gypsum, or other scouring material, each hopper having a narrow opening in its hottom, a pair of resiliently mounted contacting rollers below said opening adapted to transfer the tin plates, and removable guides disposed within the hoppers adapted to maintain the metal plates vertically in the axial plane ot the hoppers, said guides having downwardly projecting separated teeth bent inwardly at the middle and diverging at the lower ends.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

HECTOR PETIN. Witnesses:

I-I. C. Coxn, CHARLES MARDELET.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G. 

